Congrats on the new GB42!
I've been on this forum for less than a year, and continue to be amazed by the frequency with which the "boat owner's manual" question comes up. For older boats, I can understand that complete manuals weren't so easy to produce before the days of word processing software. I can also understand that stuff simply gets lost during the process of ownership transfer. It seems ludicrous, however, that one can spend a small fortune on a production yacht today and frequently get a manual with next to no specific and useful information. My 2010 boat came with a manual loaded with text, drawings and photos. Pretty. The reality, however, is that I almost never refer to it, as it's mostly useless. Instead, I've had to scratch around on the internet, search on component manufacturer sites, pester the manufacturer for more documents, etc. I mean, what other industries can get away with this, considering the sums of money involved?! Shameful!!
So, I fully agree with the others, don't stress about finding your boat's manual. Set about finding manuals and documentation for the individual components. On the plus side...what you find will be more up-to-date than whatever might have been in the original boat owner's manual, if it ever existed. Your smartphone camera will become your best friend for this endeavor, as it makes it easier to capture model and serial numbers from manufacturers' tags in tight spaces.
2010 Greenline 33' Hybrid
Home port: Malmö, SWEDEN
Currently in: Gruissan, FRANCE